Messages in this thread Patch in this message | | | From | "Joerg Roedel" <> | Subject | [PATCH 3/8] SVM: add module parameter to disable Nested Paging | Date | Fri, 25 Jan 2008 21:53:08 +0100 |
| |
To disable the use of the Nested Paging feature even if it is available in hardware this patch adds a module parameter. Nested Paging can be disabled by passing npt=off to the kvm_amd module.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> --- arch/x86/kvm/svm.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 49bb57a..2e718ff 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -48,6 +48,9 @@ MODULE_LICENSE("GPL"); #define SVM_DEATURE_SVML (1 << 2) static bool npt_enabled = false; +static char *npt = "on"; + +module_param(npt, charp, S_IRUGO); static void kvm_reput_irq(struct vcpu_svm *svm); @@ -415,6 +418,11 @@ static __init int svm_hardware_setup(void) if (!svm_has(SVM_FEATURE_NPT)) npt_enabled = false; + if (npt_enabled && strncmp(npt, "off", 3) == 0) { + printk(KERN_INFO "kvm: Nested Paging disabled\n"); + npt_enabled = false; + } + if (npt_enabled) printk(KERN_INFO "kvm: Nested Paging enabled\n"); -- 1.5.3.7
| |